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About product and suppliers:
        Alibaba.com offers 195 o ring pen products. About 4% of these are usb flash drives, 1% are ballpoint pens. 

A wide variety of o ring pen options are available to you, such as metal, paper. You can also choose from free samples. 

There are 116 o ring pen suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Germany, which supply 98%, 1%, and 1% of o ring pen respectively. 

O ring pen products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 11 with BSCI, 10 with Other, and 9 with ISO9001 certification.